Type Alias RequireAllOrNone<T, K>

RequireAllOrNone: T & Required<Pick<T, K>> | RequireNone<T, K>

Require all or none of a set of properties.

Type Parameters

T
Source object type
K extends keyof T
Keys participating in the constraint

Since

1.1.0

Remarks

Either all specified properties must be present, or none of them.

Example

type Test = { a?: string; b?: number; c: boolean };
type Result = RequireAllOrNone< Test, 'a' | 'b' >;
// { a: string; b: number; c: boolean } | { c: boolean; a?: never; b?: never; }